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Old 2010-12-11, 15:00   #34
ckdo
 
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Quote:
Originally Posted by Brian-E View Post
The completed first-time tests below M(37156667) must include thousands of incorrect results.
Likewise, the completed double-check tests below M(24036583) will certainly include hundreds of fake results. Independent verification of PrimeNet's residues isn't something that actually happens.
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Old 2010-12-11, 15:21   #35
davieddy
 
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Quote:
Originally Posted by ckdo View Post
Likewise, the completed double-check tests below M(24036583) will certainly include hundreds of fake results. Independent verification of PrimeNet's residues isn't something that actually happens.


Don't you realize what the probability of two matching
incorrect residues is?

David
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Old 2010-12-11, 15:40   #36
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Quote:
Originally Posted by davieddy View Post
Don't you realize what the probability of two matching incorrect residues is?
If you submit them both, around 100%...
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Old 2010-12-11, 15:50   #37
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Quote:
Originally Posted by ckdo View Post
If you submit them both, around 100%...
Read about the "random shifting" on the Math page.

Or did you, by "you", mean davieddy, arch-rogue extraordinaire?

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Old 2010-12-11, 16:16   #38
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I think so. Our humor is not an impediment, is it?
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Old 2010-12-11, 16:21   #39
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Quote:
Originally Posted by ckdo View Post
If you submit them both, around 100%...
I don't think my typing accuracy is up to that.

D.
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Old 2010-12-11, 16:26   #40
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Quote:
Originally Posted by davar55 View Post
I think so. Our humor is not an impediment, is it?
Mods:
Could this be wafted to one of the following threads:

Hmmm
Darkside of the Moon (a famous detective).
Music
Useless posts from ...... (please append davar55)

David

Last fiddled with by davieddy on 2010-12-11 at 16:47 Reason: "Knacker of the Yard" jest. Possibly went over some people's head. That's what comes of firing tear gas when you're pissed.
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Old 2010-12-11, 17:09   #41
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It is not a "useless" post when its purpose is to
try to restore a bit of sanity and concordance.

Last fiddled with by davar55 on 2010-12-11 at 17:15
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Old 2010-12-11, 17:54   #42
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Quote:
Originally Posted by davar55 View Post
It is not a "useless" post when its purpose is to
try to restore a bit of sanity and concordance.
Can't fool me.
There ain't no sanity clause.

David
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Old 2010-12-11, 18:05   #43
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Quote:
Originally Posted by davieddy View Post
Can't fool me.
There ain't no sanity clause.
That was from the MARX brothers, as i recall.
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Old 2010-12-11, 18:45   #44
Mini-Geek
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Quote:
Originally Posted by ckdo View Post
If you submit them both, around 100%...
If you only submit results without malice intent, quite low since there are safeguards to prevent having 0 or 1 runnings counted and credited as 2+. While rare, I'd still expect there are some errors in the DB due to accidents.
If you intentionally submit the same result twice (I'm sure there's a way, and I doubt it's too hard or would draw too much attention to yourself), then it depends on whether you ran it once or never: in the case that you ran it once, it depends on your machine's reliability, maybe average 3-4% chance that it's wrong. If you never ran it, (and just guessed the residue) it's around 100% chance that it's wrong. While I should hope there aren't many people intentionally submitting wrong results twice (or even once!), I would be surprised if no numbers are marked as done with DC with incorrect residues due to this.
Put those together, and no, the PrimeNet DB isn't 100% accurate, and no, independent verification of it just isn't done (it would be so much work!), but I'd say as a whole, the DB still has quite high integrity. I'd be surprised if any primes are missed by PrimeNet, though in the future a triple check, with results only allowed through trusted sources, checking large blocks of GIMPS work would probably be worthwhile.

Last fiddled with by Mini-Geek on 2010-12-11 at 18:47
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